Chalcogen, Conductor, Transitional, Values of sound velocity

• Ba-Cu-O-Y
• Fe-O
• Cu-La-O-Sr
• Ca-La-Mn-O
• K-O-P-Ti
• conductor
• transitional
• chalcogen
• semiconductor
• disordered
• orthorhombic
• cubic
• tetragonal
• monoclinic
• trigonal